A Nonrelativistic Electron Has a Kinetic Energy of 5

question 38

Multiple Choice

A nonrelativistic electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose wavelength is the same as the de Broglie wavelength of the electron? (mel = 9.11 × 10^-31 kg, c = 3.00 × 10⁸ m/s, 1 eV = 1.60 × 10^-19 J)

• A) 2.4 keV
• B) 2.2 keV
• C) 2.0 keV
• D) 2.5 keV
• E) 2.7 keV

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